Rotary-hook sewing-machine.



J. C. RINGE.

ROTARY HOOK SEWING MACHINE APPLICATION FILED FEB. 9. 1916 1,292,063. Patented Jan. 21, 1919.

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Arm/mgr I 1 INEESY J. C. RINGE. ROTARY HOOK SEWING MACHINE.

APPLICATION FILED FEB. 9| 19l'6;

Patented Jan. 21,1919.

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J. 0. HINGE. nomav HOOK SEWING MACHINE.

APPLICATION FILED FEB. 9, I916- Patented Jan. 21, 1 919.

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WITNESSES 5 j x 1. c. HINGE. ROTARY HOOK. SEWING MACHINE.

APPLICATION FILED FEB. 9. I916- 0m 1 H4 in 1 IS mm 4 n Au P IIWEIW'O/i r WON/EV UNITED STATES PATENT OFFICE.

JOHN o. miles. or smneaeonr, CONNECTICUT, ASSIGNOR TO THE smennmmcnnc- TUBING COMPANY. A CORPORATION on NEW JERSEY.

ROTARY-HOOK SEWING-MACHINE.

To all whom it may concern.-

lle it known that I, Jon): C. Runs, :1 citizen ot the United States, residing at Bridgeport, in the county of Fairlield and State of COIlllGtllClll, have invented certain new and useful lmn'ovements in Rotary-Hook SGVW ing-hlachines, oil: which thetollowing is a specification. reference being had therein to the accompanying drawings This invention relates to an improvement in sewing machines adapted for operation at high speed and emp oying loop-tal ers, more particularly of that class comprising a rotary loop-seizing member formed with an axial thread-cavity in which is jonrnaled a threatleasc restrained against rotation with said member; and it has for its primary object the provision of means. for handling the needle-thread in the casting of loops thereof around the mass of lower thread, of such character as'to aceomnualate a lower tl'nead capacity of the loop-taker greatlyexceeding that. which liasheen practieahle heretofore in this type. ot'marhinc.

In the development of high-speed sewing machines, or those producing 3500' to 5000 stitchesper minute, it is of the utmost-importance that all'harsh motions of operative parts be avoided. that. the. frictionof the moving parts he maintained at a minimum to prevent overheating and other ditliculties, and that the action of the thread-engaging elements upon the needle-thrmul may he gradual rather than abrupt so as to. avoid injury or kinking ot thethread resulting in its breakage or tormation'ol knots in the com )letrd stitches. Tn reco nition of these requ'ireincnts. it has become the established pract ce in the prodnctun'i of high-speed lock-stitch machines for use in the manu-.

tacture of clothing to employ a ('OlDptlI'SH tively small mass ot lower thread in order" that the loop'taker n'iay he of correspondingly small size so' as to permit of the utilization of a comparatively short length of needle-tln'ead to he lllmllpl'llflttfl in the easting of loops of the same about the mass of lower thread.

The present invention constitutes a radical del'mrture from the existing practice above described. in that it involves, in its. preferred embodiment, the employment of a thread-case of greatly enlarged capacity in Specification of Letters Patent.

Patented Jan. 21., 1919.

Application filed February 9, 1916. Serial ii'o. 77,123.

a form of loop-taker which is commercially established in practical and successful operation at high speed, in combination with a rotary takeaip having a threatvengaging element whose action upon the thread through out its operative period in each stitch-form ing cycle is positive during which period it performs an accelerated movement within a single rotation. traversed while the loopt'aker is performing two rotations.

While a vibratory take-up element may be'employed in high-speed machines wherein a normal amount of needle-thread is to he handled. such form of talte-up becomes noisy and insufficiently controls the thread when its scope is enlarged to accommodate an ahnorinally long length of threadjt'or which reason the adoption of the rotary form of take-up is imperative. The employment of an abnormally large thread-case in the ro tary hook type of loop-taker involves a correspondingly large bearing surface between the same and the loop-taking member which preclmlcs the: turning: of the latter at avv speed of more than two rotations for each recipro= cation of the needle and each rotation of the talte upr hy reason of the excessive friction and consequent overheating which would-he produced by 'a more rapid movement. of the loop-taking: member relatively to the needlebar rceiprocations.

The proper manipulation of the needletl'n'eatl above the work requires that the thread-draWing action he started promptly as the threaddoop.arri es at cast-oil position in the loop-castingoperation, and shall he completed in the setting of the stitch while the needle remains above the work. and that .the thread'shall he thereafter slaclcened proparatory to the descent of the needle-eye through the work. The relative speed of rotation between the loop-taking member and the needle-actuating shaft. and hence of the take-up; ,being titted as helore described. as well as the timing of the requisite take-up action; the movement ofth'et-hreadengaging take-up element at the same rateof speed as the needle-actuating shaft is not sulticiently rapid, and hence means aregprovided, according to the. present invention,

for imparting to it an accelerated movement during its loop-drawing and stitch-setting action."

In the preferred embodiment of the present invention, I employ the form of looptaker represented in the United 1,149,504, of August 10, 1915, but with certain added features to facilitate the casting of the needle-thread. loops about the mass j of lower thread andto insure ample lubrication of the bearing between the annular the stationary holding linger and the side raceway upon the inner wall ofthe loop--- taking member and the bearing rib uponthe thread-case within the same. As preferably constructed, the thread-case has upon the inner end of its cast-off side aperipheral segmental guard-rib adapted to shieldthe needle-thread loops from injurious contact with the peripheral bearing rib as they "are drawn ofl' the loop-taker beak, while contributing to the control of the thread-loops under the action of the take-up. Y

One of the arms by which theloop-taker I the-machine and without liability of soiling the mass of lower thread. The radial lu-bricant duct of the loop-taker is preferably formed with an enlargement affording a lubricantcavity packed with wickingor other ablsdrbent material and open ad jacent- 1 the hub for the reception of lubricanh'when- 1 its introduction at this point is desired. The outer face of the thread-case ha suipon. the cast-oil side a forwardly projeetingloopabsorbing flange at the extremity sof which it is formedwith a notch entered by and loosely embracing the rearwardlyproject' ing finger of a stationary holding member, between the extremity .of which finger and the bottom of said notch the lower thread is confined ina substantially straightpassage from the delivery sidezof the-thread-ease to the work. The thread-case has ncarly dinmetrically opposite said :notch a; shoulder engaged periodically by a laterally extending. vibratoryfinger of a reels-shaft operatively connected with the feed-lift rockshaft,"'whereby the thread-case "is slightly turned once only in each stitch-f(. i-mi|1g cy= cle to open aloop-releasing passage between of the 'embraging notch otlthcthread caSe.

The-invention: will he i'inderstood by refifi.

I States pat- I ent to P. Diehl' and M. Hemleb No. F

pinion 12 upon the in turn with .t'hel bovel 1 which Figure 1 is a sideelevation, with the frame partly in section, of a sewing machine embodying the present improvements, and ig. 2 is aview of the under side of the same. Fig. 3 is an end elevation of the machineqwith thebed-plate in section Fig. 4 is an enlarged sectional elevation of the forward end of the loop-taker shaft with its bearing and the loop-taker mounted thereon. Figs. 5 and 6 are perspective views representing the. loo -taker in different operative positions and tig. 7 a perspective view representing the loop-seizing member and the thread-case carrier section detached, with the thread-case opening'mechanism.= Fig. 8

is a perspective view ofthe thread-case and I its stationary holdei' viewed from the front side. Fig. 9 is a perspective view representing the loop-taker from the front end with the loop-seizing member in a different position from those represented in Figs. 5 and 6. Figs. 10, 11 and 12 are views represent- ,ing diagrammatically the relation of the loop taker and the take-up in different stages of a stitch-forming cycle, and Fig. 13 is a seetional'plan view through the head of the bracket-arm to show the construction of the take-up and its relation to the needlea'ctuating shaft.

The frame of the machine is construried with the usual bed-plate 1 from'which rises the jbracket-arin comprising the hollow standard 2 and tubular overhanging arm 3 terminating in the head 4 in which is journaled the reciprocating nvm'llebar 5 mrrymg the eye-pointed needle 6." The needlebar is connected by means of the usual pit man connection 7 with the actuating crankp n'fi carried by the cralnk plate 8 fixed upon the main or needle-actuating shaft 9' which is V wheel 10. Tl f'inaimshaft 9 has iiXNi there provided with theusual balanceon the bevel gear 11 moshing with the bevel upper end of line upright shaft l'ilsuilably jouriialed in bearings of the standard 2 and having fixed upon its lowenvnd the bevel pinion 14 which meshes pinion 15 fixed upon the loop-taker. shaft 16 which is mounted in bearings 17 and 18 depending "row lbr bed-'plaiel. U i' I Fixed upon the forwai'd end of the shall 16 by means of a set-screw l!) is a tubular hub 20 sustaining by. means oi" the radial of the Im a rlnsill fl he cup-shaped body se zingim-luber of the loop-lln'lo r,which is lei-fund will! a ventral thi'ead-ravity having v in its inner wall. the annular"raceway 23 whose outer wall is all'orded upon one sidev b the overhanging lip of the reim ivable segmentaisection 24 of the loop-taki-lr body.

.The loop-taker"body is fornied with lhv usual peripherally disposed beak'zfi having the point at its outer end backward ofwvhii-h is the ioop'ciistentiing shoulder 26. Extemiin'g townz'ii but having its point spaced slightly from thobeak 25 is the loop dincharging tail or spur which is shown in the present instance formed iiipon one and of the section 24i. The point of thospur 27 is directed oppositeiy to the hook and is disposofi slightly nearer the axis of rotation than the outer face of the book.

entering the raceway 23 of the hookf On' the side of the thread-case sectimrQS opposite that occupied by the shoulder 31 is the :soginentai goarciq'ib 32 which is disposed at or closeiy adjacent to the inner end of the noction 218 and terminates abrnptiy in a loop restraining shoulder 33 at the end adjacent the shouhier' (Fig. 7) for engagement with the thread-loop upon and subsequent to its; arrival at cast-off position.

The loogr'l'ulcer body is cut away dito aiiorii clearance for this guard-rib. The tin'caciwnsc section 558 is provided upon its vasi3-oii side with a forwardly extending loop-absorbing flange having an upwardly and outwardly inclined oiitor eiige 5'56. At the cxtremity of the flange 35 ailincent the loop-seizing posiiioirthc threadrueo hotly is formed in its front face with a notch iii of which one side wail is afforded by the end of the flange 35 and, the lower opposite side Wf'll ail'oxvis 2i shouiderwhioh is nmlercnt m; 38 to receive tho iow er thread h t: from the threnci-cnsc to the work. notch 3'? iooseiy cmbrz ces tho fiat extremity of the.reoiwmriiiy extending holding finger we! the stationary homing arm 40 HQCUKQKi by 2L screw f nponli-ho under face of the ho i-piatoi i i t a point sulisinntinily (limnetricaiiy opposite the noich 37 the thromiwnse is pro: viiiz-zii with projection 42 wl'iiciiofi'ords it shonlilur or-aimtment 43 adopted for engztgo mont' by a iatoraliy cxtending vibratory finger "ii upon an oXtrcmit-y oi, the rocl einz'it -l-, which is IiUIU'HRiCd in a hearing ieiccsc 46 secured .vilhin an aperture of the hearing 18. Though the oporzitivo movcmemo o the shaft 4-5 lhc finger 4% pcri, 'i ;li

iti iv sluirs {the thronii-cnnc'cilwrniariy to open 11 mop-romaine passage between the sin- !ioneryholding finger and thenndercut mill ofthe notch 31.

'iho ilii-iv3llii(3fi5fl section 28 18 provided upon inner eno with a cross member 47 The Emmi-Which rises ilie axial pin 48 upon which is journalcii tho'iuhulnr poet of vvoll lcnown form disposed con rally oi? the rap i section 29 and upon which is mounioil the 1 bobbin '9 carrying the mass oi lowvr thread 50.

One of the radial arms of the loopiniting member is formed with nv riu'iinl illillhiliii) duct 51 which e'xtcnils on \vnniiy from the bore oi. the huh and merges into a. sub stantially radial lubricant cavity 52 which is closed ioiiernily :11 ihoinnur fut-( of the arm E21 by an angular sliollor hood 5% which is open at itsinnon mnl ri-rin-"woriily oi Siihi arm (-Fighu 4 and ihis inln-icnnt unity is designed to be filiod \vilh \vieicingor other absorbent Inutoi'ini to retain n supply of oil intlocluood either from this inner omi oi iho' cavity or through the hub 20. The oulor end of tho cavltyofil 1S ronnectcd by one or more passages Wi'liil tho ran-away through which iubii'icant may be supplied toninintain the bearing between tho thread case and the loop-taking mombor properly lubricated.

The shaft 16 is .sshowo provided with an axial lubricant inisrmgo' 5:3 having at one (and av transverse branch 56 in roginlcr with ilmilucta'ilof llio loop-tuiicr, tliuifll (in other end a second transversebranch 5? loading outwardly to its periphery which in prof? 'erobly formed with it shallow groovofiii oxicnding around it for constnnt connnnnirw tion with a lubricant passage 5i) oxtondiug downwardly from the topzo'l" tho bGti-Piitifi throngh'iho hearing; 18 :u'nithc bushing 18 surrounding the shaft lit By the means (lo scribed, that bearing of the i-iil'QEUl-(HHU \vitliin thoioifp taking member may lionmiin toineii proporiy iubrica/ted by introduction oi oi] from above the bed-pinto throughthe passage 59, or by application of oil to the contained absorbent packing through the mouth of the lubricant -'cnvity Connoctcd to and rotating with the mail shaft 9 is the tokomp iiiskl'ifi having upon its face the eiongz to'ti log (31 to which is scoured by snitabie means the guard-ring- 62. Adjacent Hie ing 61 in n. curved slot (33 in which works the stuiiqiin (34 which movcgs from one to the other sin-inf the slotin the rotation of the coin-up diskfii').

Tho stnd-pin (i4- onrriod by the free end of the vibratory lever 6-5 wine is 'fuicrnmoil at its opposito v -F pon the pin 66 sustained off-the (link 10. intermediate its cncis, tho lever fiiiinm on onisirgcmont (31' formed with a rectangular opening w hich embraces a siidohiock (i8noortnrcri to lit the stzi.tiomur ccccl'itric 69 fixeii'upon thecroesonemberT0 of theliracketarm heaci, The crank-pin 8' carries; a. b05371 arranged. conceniiricaiiy with the necdie-actimting shaft 9 anci journaled in as. hearing; operture of the stationary Cfi eccentric (39. The disk 60 is secured by means of the fastening screws 72 t0 the outer end of the boss 71..

'lhrough the described ronnections, the disk (it; and guard-tingtizl.spaced therefrom, rotate in unison with the needle actuating shaft, the lever 6;) performing its operative. accelerated movement to move the studspin (it from one to the other end of the slot 63 mediate the disk (it) and filluUl-l'inQiiQ over the needle-bar and through the needle-eye The. feedalog' Tii is mounted upon the feedbar 76 which derives its endwise or workadvancing movements l'roni allexible eonneetionflwith an arm T7 upon the feetlroekshalt i8. and its rising and falling inovemeats .i'roiu theieeddiit reek-shaft 79 through a link eonueetion S1" with a lateral e'ranksirm htl ot' the .roeleshai't IQ. The. roek-shat'ts T3 and T!) are providedWith-the HslHllluitYHl tl'illlh tll'lll; 82 and 8;,hfre speetively. which are eonneeted by means of the pitmen Hi and 85 with the. usual actuating eeeentries Strand upon the main-shaft l) in a. manner well-knon*n.

' 'l'he iIeed-liitv reek-shaft is provided rear- 7 ward of the bearing 18 with a. lateral rrankarm SH to which is operativel v eonneettal throughthe link 8!) the. tl'tllll(illlll iltl havin; its split hub clamped upon the. roele shai't. l by. means oi the screw ill. As the leeilalog rises simultaneously with the aseent' ohlluyneedle. in the initial portion of the lOOP-tttfiilllg operation. the deseribed eon ner'tion with the leeddil't: reek-shaft causes theadvame oi' the linger l-i to engage the thread-ease shoulder 43, thereby imparting to the threinlwase a ii ht turuing movement which is completed in time to atford the requisite opening between the stationary h lding linger and the adjacent. wall of the thread-ease notch 17" for the escape of t he needie-tln'ead loop in the final aetionot tile takeup thereon.

in the operation oi" the stiteh l'ormiiig meehanisne in the rise of the needle a tier :1.

deseeut to extreme lower position the needl-e thread is seized by the point of the loo|itaker beak 25. and. while one limb of the loop thus formed is detained by the threadease shoulder Iii, the other limb is distended to the inner end of the. tlireml ase during which time the take-up is giving up slack in its movement i'rom substantially the erated movement of the latter threadengagin; elelnent prm-eeding at the same time;

, As the rotation of the hook proceeds while the .take-up is moving from the position shown in. Fig; 10 to that represented in Fig. 11, thethrezul-loop isdrawn oil the point of the beakand(upon the loop-discharging spur 27. resting in this movement upon the outer face of the beak and the guard-rib 32 (Fig. 9) which insure the support of the end of the loopbeyond the outer face of the. spur 27. As the loop-casting operation proceeds, the loop. which is being progressively re dueed insize under th 1. action of the takeaip, is maintained. distended around the spur 27 and the. imp-absorbing flange 35 (Fig. t3) so, as to insure against kinking iii-twisting by preimiture release. 7

The... thread-loop is thus held until the point of the loop-diseharging spur arrives at about imp-seizing position, when the loop is drawn up into the work and the stitch is set by theiinal action of the take-up (Fig. 11).

.The iinal aetionof the take-up is such that tlutneedle-thiead remains taut onl until the pointiot', thel needle is about to enter the work, \vhen'shiek is given up rapidly to enable the loop-taker to readily disteud the sureeeding loop seized from the needle While the guard-rib :12 is herein representedas of less height than the hearing rib 150'. it is so related to the latter that in the traverse ot the neialle-threzul loop from the hea k 'tothe loop-disehargiugr spur it is etx'ectivel v shielded from rubbing upon the hear.- ing rihand berominsoiled. thereby. By

providing: the lfitip't etaining shoulder tlfi the upper portion of the loop is prevented from slipping prematurely around the pe riphery ot' the threzulrase as the loop-ta (er beak performs its upward movementfrom rast otl' position. as represented in Fig. 5,

thereby tu'eventine the t'tn'ination of undue slat-k in the loop kinking or Mingling", usually resulting in the tormationof loopser knots upon the bottom of the finished work. lliy reason of the abnmn'ulllv large si a eiof the loop-taking member and the thread-ease to aeeommialatethe desired increased thread capacity, the j'size of the bearing between these partsof.theloep-taker is correspond ingly inereased,"and 1hespecial oiling faeiiities' herein shown and described are of importance to insure smoothness of operation; while the increased size of the needle-thread loop renders the effective control of the same of the utmost importance in order to secure uniform and perfect work.

By reference to Figs. Sand 9, and particularly the former, it will be observed that the lower thread 6 is led. from the delivery guidecyc 29 of the thread-case at the side opposite the loop-absorbing flange and across the outer face of the cap section through the notch 37 in a substantially straight line. "It is thus prevented from accidental escape by confinement in the channel-formed between the flat inner end of the holding finger -3 and the bottom of the notch 37. The thread thus crosses beneath the finger diagonally so as to be engaged thereb at points extending substantially across i ie notch'37, which is made unusually wide for the purpose.

Having thus set forth the nature of the invention, what I claim herein is:-

l. In a sewing machine, incombination, e reciprocating needle, a loop-taking memccr performing" two rotations for each reciprocation of said needle and formed with an axial thread-cavity and with peripherally arranged and oppositely directcninferential movements ,in the direction of rotation of said carrier; in its action upon the needle-tinned succeeding the arrival of a. needle threa lloopght castoll position around the thrcod'oesej '3. in a sewinginachiin-z. in c oinhination;

her performing on; rotations for each ro ciprocaiion of said needle and formed with all axial thr adca /it 1nd with peripherally arranged and nilpORltGlflf directed loop-seizingz heali and loop-discharging spur, a th read case journalcd. in. said. loop taking member andprovidedsyith a forwardly projecting loogmliecluirgrmir flange at substanliolly loop"discharging position upon its i. s fornnnga. single rotation for form a loop detainingshoulder and an ad-' ditional peripheral guard-rib at the end of the th cad-case adjacent the bottom of said threa cavity free from contact with the loop-seizing member and disposed within a semi-circumference opposite that. occupied by said loop-deteining shoulder.

4. A sewing machineloop-takercomprisiug a cup-shaped loop-seizing member provided with a thread-cavity having anannnlar raceway, and a thread-case having a peripheral bearing rih jonrnalcd in said raceway by which the thread-case is exclusively supported and interrupted on one side to form a loop-detaining shoulder and an additional peripheral guard-rib at the end of the 5. A sewing machine loop-taker compris thread'caseadjacont the bottom of 'said.

thread-cavity free from contact Wit-lithe loop-seizing;- member and disposed within a'semi-circnmference opposite thztt occupied by said loop-detaining shoulder and formed with a loopwletaining shoulder upon the end adi'accnt said shoulder of th bearing rib.

Inn sewing machine, in combination, e reciprocating needle; :1 loop taking member performing-e plurality of rotations for each reciprocation of said needle and forined with an axialthread-cavitynnd With a peripherally arranged loop-seizing beak, a-

thread-case journaled in said loop taking and a take-up comprising acarrier perinch recipro- -memher and provided,with. meansjtor rm "straining it againstgrotntion Wllil'l lil gsamor;

cation of the needle, a plurality of three l engaging elements rotating with sol-"i (or met, and'mcnns for imparting to one of said thread engaging elements accelcralml circumferential movements in the direction oi rototion'of said carrier in its action upon the needle thread succeeding the arrival of ii needle-threadloop at cast-off position around the thread-case. I

r 6. A. sewingmachine loop-taker having a loop-seizing beak, a loop -ilischarging spur disposed oppositely to said heal: and having its point depressed helow the latter, a thrcadwase having a single hearing rih journaled within said loop-takef and a guard I'll) atone side of said beak and spur, whereby a thread-loop is deflected from said" hearing rib-and upon said spur.

Ill

e 7. A Sewing machine loop-takerhaying .In testimony whereof I; have signed my a, loop-seizing beak, a thread-ease having name to this'speeification in the presence-0f 10 :iz singlekbearmg ril; joiirlnaled withind ,two subscribing witnesses.

00 -'t'a' er means or u rieatinglsai ri" 5 an a gua'z d-rib adjacenij'said beai' ingvrib v HN N 7 for defleeting thread from contact with aid Witnesses: bearing rib, thereby preventing soiling of V, STANLEY N. SMITH, the thread; W. W. DEIJANEY. 

